Knife-sharpener



(N0 Model.)

P. J. REINHO'LD.

KNIFE SHARPBNER.

INVENTbR A X c.

Attorney WITNESSES /Mdw UNITED STATES PATENT Trice.

FRANK J. REINIIOLD, OF DETROIT, MICHIGAN.

KNlFE-SHARPENER.

QPECIPICATION forming part of Letters Patent No, 331,545, dated December 1, 1885. Application filed February 17,1885. Serial No. 156,212. (No model.)

To all whom it may concern.-

Be it known that I, FRANK J. REINHOLD, of Detroit, county of Wayne, State of Michigan, have invented a new and useful Improvement in Knife-Sharpeners; and I declare the following to be afull, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form a partdf this specification.

My invention relates to knife Sharpeners; and it consists of the combinations of devices and appliances hereinafter specified,and more particularly pointed out in the claims.

In the drawings, Figure 1 is a horizontal section illustrating my invention. Fig. 2 is a vertical cross-section; Fig. 3, a side elevation showing parts in section. Fig. 4 is a horizontal section illustrating a modification.

I carry out my invention as follows:

A is any suitable support, preferably constructed and arranged so that the sharpener may be attached to a table or bench.

B and 0 represent rollers constructed with a sharpening-surface in any suitable manner. The rollers may be constructed of metal, having corrugated or file surfaces, or they may be constructed of any desired material adapted to the purpose. These rollers are mounted upon shafts b and 0, having their bearings in the supporting-frame A. The roller B may be constructed with a flange, Z), and the roller 0 with a corresponding groove, 0', in which I prefer to engage an elastic band, 0 One or both of the roller-shafts I prefer to provide with a spring, as shown at b". The roller Bis also constructed with a ratcheted end surface, as shown at If.

D is a pawl suitably secured to the frame, adapted to engage with the ratcheted surface b This pawl I prefer to engage upon a block, at, engaging upon an adjusting-screw, D, so that the pawl may be set to or from the ratcheted surface, as may be desired.

d is aspring adapted to hold the pawl in engagement with the ratcheted surface of the roller. The shaft 0 is preferably extended and provided with a knob, 0 .so that the roller 0 may be rotated by the hand, if desired, to bring a fresh sharpening-surface to the knife.

E is a brush located adj acent to the contact sharpening-surfaces of the two rollers, adapted to clear the knife from grit after it has been drawn through the rollers.

F and F represent guards, which may or may not be omitted without departing from the principle of my invention.

The operation of the device is as follows: The knife G is inserted between the contact sharpening-faces of the rollers, as illustrated iii Fig. 2. The operator, giving a downward and drawing movement through the rollers, compresses the spring b", permitting the roller 13 to ride away from the pawl sufficiently to cause the pawl to engage in a different position in the ratcheted surface I), so as to throw the roller over slightly upon its shaft. The flange b, engaging with the elastic band 0', tends at the same time to revolve the roller 0 slightly, so that both rollers present a differentsharpening-surface to the knife. Thus the rollers are prevented from being unduly worn at any particular point, as they are more or less rotated by every operation of the knife in connection therewith. At the same time the' knife is drawn through the brush, clearing it from grit. Instead of the brush, a piece of soft wood might be located in the same position for the same purpose.

Instead of constructing the roller B the same width as the roller 0 and flanged midway of its end faces, as shown, it is evident that it may be constructed thinner, so as to fit into the groove of the roller 0, as shown in Figs. 1 and 3, between the dotted lines. The parts outside the dotted lines might be entirely omitted from the roller B without departing from the principle of my invention. I would have it understood, also, that I do not limit myself to the construction of the roller 0 with a groove therein provided with an elastic band.

I have already stated that the object of so constructing the roller as shown in Fig. 1 was to secure a partial rotation of said roller by friction with the roller B; or each of the rollers may be provided with a spring, I)", and each be constructed with a ratcheted face, and provided with a pawl, D, to engage and operate both the rollers to secure their partial rotation as the knife is drawn through their contact-faces. This construction is shown in Fig.

4, in which rollers with plain faces are used.

I do not limit myself to any particular construction of the rollers, as shown. When the grooved roller is used with an elastic band, as

5 shown in Fig. 1, it may be constructed with two separate disks riveted together upon an intermediate hub. The ratcheted end of the roller may be constructed of a separate disk and secured to the roller, if desired. Any [0 suitable spring, I), also may be employed.

What I claim is 1. In a knife sharpener, the combination, with two sharpening-rollers mounted upon shafts, of ratchet mechanism and a spring act- 5 ing on one of the rollers to permit it to yield, substantially as and for the purpose described.

2. In a knife-sharpener, the combination, with two sharpening-rollers mounted upon shafts and having frictional contact with each 0 other, of ratchet mechanism and a spring acting on one of the rollers to permit it to yield, sn hstantiall y as and for the purpose described.

3. In a knife-sharpener, two sharpeningrollers mounted upon shafts, one of said roll- 5 ers constructed with a groove provided withan elastic band, and the other roller constructed to engage in said groove and in frictional contact with said band, substantially as and for the purpose described.

4. A knife-sh arpener consisting of a support, 0 sharpening-rollers mounted upon shafts having their hearings in said support, one of said rollers constructed with a groove provided with an elastic band and the other roller constructed to engage in said groove and in fric- 3 5 tional contact with the band, one of said rollers provided with ratchet mechanism and a retracting-spiing, all arranged substantially as and in the manner described.

5. In a knife-sharpener, two rollers provid- 40 ed with sharpening-surfaces mounted upon shafts, and a brush located in range of the contact-surfaces of said rollers, substantially as and for the purpose described.

In testimony whereof I sign this specifica- 5 tion in the presence of two witnesses.

FRANK J. REINHOLD. Witnesses:

N. S. WRIGHT, M. B. ODOGHERTY. 

